单词：diagnostic surface horizon
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Conditions on Mars were so harsh that it was hard to imagine any life surviving there. The idea of sophisticated aliens was wiped out. We know that conditions on Mars today are not very good for life.
火星生命
But even if there had been water, life doesn't start overnight. Even a simple microbe is the product of complex chemical systems that take millions of years to evolve. Had the water lasted long enough
火星生命
When it comes to the stock market, are you smarter than a first grader? Youd better wait a few minutes before you answer. Im Carl Azuz. This is CNN Student News. Authorities around the Gulf of Mexico are in a race against time. They are trying to con
CNN2010年(五)月
New horizon's chief scientist is H. And where we are right now is a mission control for the new horizon's mission to Pluto, this is where we watch all the activities that are currently on the new horizon's mission, we have over here to the left the p
探索与发现2015年
How Far Away Is The Horizon? 地平线有多远？ Heres a neat question you may have never thought to ask. How far away is the horizon? 你可能从未思考过这个简单的问题，地平线有多远？ Flat Earth 地球是平的 Think about it.
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Well, hearing that Odyssey had found subsurface water on Mars was enormously exciting for somebody who is involved in planning to send humans to Mars. Water has a number of important uses for us. At t
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